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POHibernate storing maps using @MapKey annotation
 

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    <p>Following these <a href="http://download.oracle.com/javaee/5/api/javax/persistence/MapKey.html" rel="nofollow">examples</a>, because <code>@MapKey</code> and <code>@MapKeyManyToMany</code> in <a href="http://docs.jboss.org/hibernate/stable/annotations/reference/en/html_single/" rel="nofollow">hibernate</a> is deprecated, I tryed to figure out this case, with no sucess: </p> <p><strong>taskAssignationState</strong></p> <pre><code>protected Map&lt;User, Boolean&gt; usersState; @ManyToMany( cascade={CascadeType.ALL}, mappedBy = "taskAssignationState", fetch=FetchType.LAZY ) @MapKey(name = "user") public Map&lt;User, Boolean&gt; getUsersState() { return usersState; } public void setUsersState(Map&lt;User, Boolean&gt; usersState) { this.usersState = usersState; } </code></pre> <p><strong>User</strong> </p> <pre><code>@ManyToMany(cascade=CascadeType.ALL) @JoinTable(name = "user_state_task_assignation", joinColumns=@JoinColumn(name="username"), inverseJoinColumns=@JoinColumn(name="assignation_state")) public TaskAssignationState getTaskAssignationState() { return taskAssignationState; } public void setTaskAssignationState(TaskAssignationState taskAssignationState) { this.taskAssignationState = taskAssignationState; } </code></pre> <p>I have also tried <code>@MapKeyColumn</code>, <code>@MapKeyJoinColumn</code>/<code>@MapKeyColumn</code> instead, but with the same resault. The exception</p> <blockquote> <p>Caused by: <code>org.hibernate.AnnotationException</code>: Illegal attempt to map a non collection as a <code>@OneToMany</code>, <code>@ManyToMany</code> or <code>@CollectionOfElements</code>: <code>com.path.taskAssignationState</code></p> </blockquote> <p>I read in another threat a similar problem, and the solution was to make a <code>Set</code> and then join the tables. But I guess there is a way using these annotations. </p> <p><strong>EDIT</strong></p> <p>The previous problem is fixed, just need to return an List. </p> <pre><code>@ManyToMany @JoinTable(name = "user_state_task_assignation", joinColumns=@JoinColumn(name="assignation_state"), inverseJoinColumns=@JoinColumn(name="username")) @MapKeyJoinColumn(name="state") public Map&lt;User, Boolean&gt; getUsersState() { return usersState; } public void setUsersState(Map&lt;User, Boolean&gt; usersState) { this.usersState = usersState; } @ManyToMany( cascade={CascadeType.ALL}, mappedBy = "taskAssignationState", fetch=FetchType.LAZY ) public List&lt;TaskHistory&gt; getTasksHistory() { return tasksHistory; } public void setTasksHistory(List&lt;TaskHistory&gt; tasksHistory) { this.tasksHistory = tasksHistory; } </code></pre> <p>But now I am facing this other probelm: </p> <pre><code>org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in class path resource [applicationContext-dao.xml]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Use of @OneToMany or @ManyToMany targeting an unmapped class: com.path.TaskAssignationState.usersState[java.lang.Boolean] at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1412) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:291) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:288) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:190) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:546) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:872) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:423) at org.springframework.context.support.ClassPathXmlApplicationContext.&lt;init&gt;(ClassPathXmlApplicationContext.java:139) at org.springframework.context.support.ClassPathXmlApplicationContext.&lt;init&gt;(ClassPathXmlApplicationContext.java:83) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:513) at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:202) at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:251) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15) at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:248) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184) at org.junit.runners.ParentRunner.run(ParentRunner.java:236) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197) </code></pre>
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